An efficient approach to trans-4-hydroxy-5-substituted 2-pyrrolidinones through a stereoselective tandem Barbier process: divergent syntheses of (3R,4S)-statines, (+)-preussin and (−)-hapalosin
作者:Chang-Mei Si、Lu-Ping Shao、Zhuo-Ya Mao、Wen Zhou、Bang-Guo Wei
DOI:10.1039/c6ob02523d
日期:——
diastereoselective approach to trans-4-hydroxy-5-substituted 2-pyrrolidinones 1 (P1 = TBS, P2 = H) has been developed through a stereoselective tandem Barbier process of (R,SRS)-8 with alkyl and aryl bromide. The stereochemistry at the C-5 stereogenic center of the trans-4-hydroxy-5-substituted 2-pyrrolidinones was solely controlled by α-alkoxy substitution. This effective approach was successfully used
通过立体选择性串联Barbier过程(R,S RS)-8与烷基和芳基的对映体,开发了一种非对映选择性的方法,用于反式-4-羟基-5-取代的2-吡咯烷酮1(P 1 = TBS,P 2 = H)溴化物。反式-4-羟基-5-取代的2-吡咯烷酮在C-5立体中心的立体化学仅受α-烷氧基取代的控制。这种有效的方法已成功用于制备各种取代的(3 R,4 S)-statines 2。此外,两种具有(+)-preussin 4的生物活性天然产物通过这种立体选择性串联Barbier方法有效地合成了Hapalosin 5和Hapalosin 5。